Soft Start Torque Limiter
Soft Start Torque Limiter
(OP)
I am a mechanical engineer with limited electrical knowledge so please exscuse any part of this question that may be simple or incorrect.
I have an ATEX rated geared motor unit driving a slow speed vessel agitator. I was planning to use a frequency inverter to set a torque limit but have now found the motor is not inverter rated for Ex applications.
My question is, would it be possible to use a soft start as the torque limiter instead of a frequency iverter?
I have an ATEX rated geared motor unit driving a slow speed vessel agitator. I was planning to use a frequency inverter to set a torque limit but have now found the motor is not inverter rated for Ex applications.
My question is, would it be possible to use a soft start as the torque limiter instead of a frequency iverter?





RE: Soft Start Torque Limiter
If your concern is only for torque during starting, the soft starter might work depending on how severe the torque limitations are.
David Castor
www.cvoes.com
RE: Soft Start Torque Limiter
RE: Soft Start Torque Limiter
RE: Soft Start Torque Limiter
Muthu
www.edison.co.in
RE: Soft Start Torque Limiter
There is a product called a shaft power monitor that can be used to act like a shear pin.
See http://
This technology is also built in to the MSF soft starter at the same website. This will cause a trip if the set torque is reached rather than limit the actual torque produced.
Best regards,
Mark.
Mark Empson
L M Photonics Ltd
RE: Soft Start Torque Limiter
We have now changed the motor ordered to an Ex rated for the VFD, this meant a small increase in power from 6.8 to 7.5kW, but no major problems.
Thanks Again.
David